Investigations on pressure dependence of Coriolis Mass Flow Meters used at Hydrogen Refuelling Stations |
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| O. Büker, K. Stolt |
- Abstract:
- In the framework of the ongoing EMPIR JRP 16ENG01 “Metrology for Hydrogen Vehicles” a main task is to investigate the influence of pressure on the measurement accuracy of Coriolis Mass Flow Meters (CFM) used at Hydrogen Refueling Stations (HRS). At HRS hydrogen is transferred at very high and changing pressures with simultaneously varying flow rates and temperatures. It is clearly very difficult for CMFs to achieve the later expected legal requirements in relation to the demand for accurate mass flow measurement at the measurement conditions at HRS. It was observed, mainly due to the very dynamic filling process, that the accuracy of mass flow measurement at different pressure ranges is too inaccurate. Particularly at higher pressures it was found out that especially short refuelling time causes significant measurement deviations. On this background it can be concluded that the medium pressure has a great impact on the mass flow measurement accuracy. To gain a deeper understanding of this matter RISE has built a unique high-pressure test facility. With the aid of this newly developed test rig it is possible to calibrate CFMs over a wide pressure and flow range with water and base oils as test medium. The test rig allows calibration measurements under the conditions prevailing at 70 MPa HRS regarding mass flows (up to 3.6 kg min-1) and pressures (up to 87.5 MPa).
- Download:
- IMEKO-TC9-2019-037.pdf
- DOI:
- -
- Event details
- IMEKO TC:
- TC9
- Event name:
- FLOMEKO 2019
- Title:
18th International Flow Measurement Conference 2019
- Place:
- Lisbon, PORTUGAL
- Time:
- 26 June 2019 - 28 June 2019